Advances in Polymer Technology / 2020 / Article / Fig 9

Research Article

3-Bromopyridine-Heterogenized Phosphotungstic Acid for Efficient Trimerization of Biomass-Derived 5-Hydroxymethylfurfural with 2-Methylfuran to C21 Fuel Precursor

Figure 9

XRD patterns (a), FT-IR spectra (b), and TGA curves (c) of the recycled (after the fourth run) and fresh 3-BrPyPW catalysts.

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